Improvement in plow-points



UNITED STATES PATENT QFFIE.

LUTHER H. CALVIN AND JOHN WALLACE, OF MELBURN, OHIO.

IMPROVEMENT IN PLOW-POINTS.

Specification forming part of Lettere Patent No. 157,790, dated December15, 1874; application filed November 13, 1874.

To all whom it may concern:

Be it known that we, LUTHER H. CALVIN and JOHN WALLACE, of Melburn, inthe county of Williams and State of Ohio, have invented certain new anduseful Improvements in Plow-Points; and we do hereby de clare that. thefollowing is a full, clear, and exact description thereof, which willenable others skilled in the art to which it pertains to make and usethe same, reference being had to the accompanying drawings, and to theletters of reference marked thereon, which form a part of thisspecification.

The nature oi' our invention consists in a sleeve or socket made ofsheet-steel, in such a form as to fit over the point of a plow, andextend along the share of the plow for a snit-- able distance, as willbe hereinafter more fully set forth.

In the accompanying drawing, Figure lis a plan view of a deviceembodying our invention; Fig. 2, the metal from which the point is made.Fig. 3 represents a side elevation, and Fig. 4 a transverse section online t t of Fig. 1.

It is well known that the point is the. part of a plow that most quicklywears out, and requires either sharpening or replacing. For this purposeplow-points have been made to suit the different kinds of plows, so thatwhen one is worn out it may be removed and another substituted. This isquite a heavy item of expense, asa number of points will get worn out ina single seasons plowing; and, besides, the substitution of newplow'points only partially remedies the wear and tear of the plow, forthe reason that the share also gets more or less worn.

To obviate this difculty, and to lessen the expense to farmers, are theobjects of our invention; and to this end we cut a piece of sheet-steelin such a form that, when bent over double, it will form a sleeve orsocket, A, with a double wing, B, extending from the inner side. Theedges of the doubled sheet-steel are welded together along the line a bd e, and

made into cutting-edges. The sleeve or socket A is made of suitable formto slip over the point of the plow for which it is intended, and thewing B to t over the edge of the plowshare. The wing B forms aprotection for the under side of the share, as well as for the upper.

When a plow-point becomes too much worn, the sleeve or socket A issimply slipped over the old point. No fastening is required, as all thestrain has a tendency to draw it tighter upon the point. This device canbe manufactured very cheap, and is durable and not liable to get out oforder.

We are aware that a V-shape cutting-edge has been shrunk upon the share;butin this device the edge is not easily removed, and must be sent to asmiths shop to be attached. Ve are also aware that slip-points, made ofsheet-steel, have been used, with a cuttingedge upon the upper edge ofthe share, fastenedby bolts or lugs. In these devices the bottom of theshare is not protected.

We lay no claim to any of the above-named devices; but,

Having thus fully described our invention, what we do claim, and desireto secure by Letters Patent, is-

The socket A and the wing B in V form, in

section, with edges a b d e, and formed of a single piece ofsheet-steel,bent and welded as described, forming a plow-point and awearingsurface for both thev upper and lower portions of the share, andsecured in position without bolts or lugs, as and for, the purpose setforth.

In testimony that we claim the foregoing as our own we affix oursignatures in presence of two witnesses.

LUTHER H. CALVIN.

JOHN WALLACE.

Witnesses J oHN MANON, S. S. LovEJoY.

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